1990 740gl 25-35mph steering wheel wobble

[Mountain]

Just had the steering wheel wobble violently(hand at 12 it shook between 1 and11). Was going 35 pulled over to make sure I want losing a wheel. Tire pressure and mount appears ok. Have had the engine mounts and steering column and joint along with majority of front end replaced within last two years. Any thoughts as to the culprit would be appreciated. Thanks

[Mountain]

After I pulled over and assured tires were ok I cranked the wheel a bunch power steering is functioning that has been replaced as well. After continuing at 35 for a mile or so it went away completely